Is light made of particles or waves? The answer, according to quantum physics, is both. Depending on the situation, particles of light—and particles of matter too—sometimes contradict themselves and act like waves. But between these two extremes, there's a range of behaviors. Scientists have now demonstrated those intermediates in a conspicuous way.
The new research is a variation on the so-called double-slit experiment, a staple of introductory quantum theory courses. In the class